Table Of Contents; General Safety Information; Precautions; Grounding Instructions - A.O. Smith BTR 151 THRU 201/A Installation & Operation Manual

Commercial gas, glass-lined, tank-type water heater
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TABLE OF CONTENTS

ROUGH-IN-DIMENSIONS ..................................................... 2
FOREWORD .......................................................................... 2
GENERAL SAFETY INFORMATION ....................................... 3
Precautions ....................................................................... 3
Grounding Instructions ...................................................... 3
Chemical Vapor Corrosion ................................................ 3
Improper Combustion ...................................................... 3-4
Extended Non-Use ............................................................ 4
Insulation Blankets ............................................................ 4
High Altitude Installation .................................................... 4
FEATURES ............................................................................ 4
The Eliminator™ (Self-Cleaning System) ....................... 4-5
High Limit Switch ............................................................... 5
Electronic Ignition Control ................................................. 5
Exhaust Inducer (Blower Assy.) ......................................... 5
Circulating Pump ............................................................... 5
Dishwashing Machine Requirement ................................ 5
INSTALLATION INSTRUCTIONS ........................................... 6
Required Ability .................................................................. 6
Uncrating ........................................................................... 6
Locating The Heater .......................................................... 6
Levelling ............................................................................ 6
Clearances ........................................................................ 6
Hard Water ........................................................................ 6
Air Requirements ............................................................. 6-7
Venting .............................................................................. 7-8
Multiple Heater Manifold .................................................... 8
Water Line Connections ................................................... 8
Thermometers (Not Supplied) .......................................... 8
Relief Valve ........................................................................ 8
Gas Piping ......................................................................... 9
Purging .............................................................................. 9
Gas Pressure Regulator ................................................ 9-10
Heater Wiring .................................................................... 10

GENERAL SAFETY INFORMATION

PRECAUTIONS

DO NOT USE THIS APPLIANCE IF ANY PART HAS BEEN UNDER
WATER. Immediately call a qualified service technician to inspect
the appliance and to replace any part of the control system and
any gas control which has been under water.
IF THE UNIT IS EXPOSED TO THE FOLLOWING, DO NOT
OPERATE HEATER UNTIL ALL CORRECTIVE STEPS HAVE
BEEN MADE BY A QUALIFIED SERVICEMAN.
1. EXTERNAL FIRE.
2. DAMAGE.
3. FIRING WITHOUT WATER.
4. SOOTING

GROUNDING INSTRUCTIONS

This water heater must be grounded in accordance with the
National Electric Code and/or local codes. These must be
followed in all cases.
This water heater must be connected to a grounded metal,
permanent wiring system; or an equipment grounding conductor
must be run with the circuit conductors and connected to the
equipment grounding terminal or lead on the water heater, see
Figure 9.
Page
INSTALLATION DIAGRAMS ................................................ 11-17
OPERATION ......................................................................... 18
General ............................................................................ 18
SEQUENCE OF OPERATION .............................................. 18
Lighting and Operation .................................................... 19
Water Temperature Control ............................................. 20
PREVENTIVE MAINTENANCE ............................................ 20
Check The Ignitor Assembly ........................................... 20
Ignitor Assembly .............................................................. 20
Main Burner ...................................................................20-21
Gas Valves ....................................................................... 21
Checking The Input ......................................................... 21
Venting System ................................................................ 21
Relief Valve ...................................................................... 22
Hot Water Odor ................................................................ 22
Anode Rod Inspection ..................................................... 22
Flushing ........................................................................... 22
Draining ........................................................................... 22
Removal of Lime Deposits From Tank Type
Commercial Water Heaters .......................................... 22-23
Deliming Solvents ........................................................... 23
Tank Cleanout Procedures ...........................................23-24
Ignition Module System ................................................... 24
System Diagnostics ........................................................ 24
SERVICE ............................................................................. 24
Electrical Servicing .......................................................... 24
Replacement Parts ......................................................... 24
Sequence of Operation Flow Chart ................................. 25
Operational Checklist ...................................................... 26
Limited Warranty ............................................................. 27

CHEMICAL VAPOR CORROSION

CORROSION OF THE FLUEWAYS AND VENT SYSTEM MAY
OCCUR IF AIR FOR COMBUSTION CONTAINS CERTAIN
CHEMICAL VAPORS. SUCH CORROSION MAY RESULT IN
FAILURE AND RISK OF ASPHYXIATION.
Spray can propellants, cleaning solvents, refrigerator and air
conditioning refrigerants, swimming pool chemicals, calcium
and sodium chloride (water softener salt), waxes, and process
chemicals and typical compounds which are potentially corrosive.
Do not store products of this sort near the heater. Also, air which
is brought in contact with a the heater should not contain any of
these chemicals. If necessary, uncontaminated air should be
obtained from remote or outside sources. The limited warranty
is voided when failure of water heater is due to a corrosive
atmosphere. (Refer to the limited warranty for complete terms
and conditions.

IMPROPER COMBUSTION

ATTIC AND/OR EXHAUST FANS OPERATING ON THE PREMISES
WITH A WATER HEATER CAN RESULT IN CARBON MONOXIDE
POISONING AND DEATH.
3
WARNING
WARNING
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This manual is also suitable for:

Btr-151Btr-151aBtr-201aBtr 201

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